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Chi square test: Heart disease & Personality

Help needed for chi square statistic on this problem:

A study suggested that personality type is related to heart disease. Specifically, type A people,who are competitive, driven, pressured, and impatient, are more prone to heart disease. Suppose that an investigator would like to examine the relationship between personality type and disease. For a random sample of individuals, personality type is assessed with a standardized test. These individuals are then examined and catagorized as to whether they have a heart disorder. The observed frequencies are as follows:

No Heart disease Heart Disease
Type A 32 18 50
Type B 128 22 150
160 40

Is there a relationship between personality and disorder? Test at the .05 level of significance.

Solution Summary

The solution provides step by step method for the calculation of chi square test for association. Formula for the calculation and Interpretations of the results are also included. Interactive excel sheet is included. The user can edit the inputs and obtain the complete results for a new set of data.